document.write( "Question 165404: I am not sure if I picked the right catagory but I am having a hard time with on algebra word problem.
\n" ); document.write( "If the formula R = -0.037t + 50.1 can be used to predict the world record in the 400 - meter dash t years after 1925, for what years will the world records be 47.6 seconds or less?\r
\n" ); document.write( "\n" ); document.write( "If you could help me with this I would SO appreciate it!
\n" ); document.write( "Jen \n" ); document.write( "
Algebra.Com's Answer #121906 by nerdybill(7384)\"\" \"About 
You can put this solution on YOUR website!
You are given:
\n" ); document.write( "R = -0.037t + 50.1
\n" ); document.write( "where
\n" ); document.write( "R is the record
\n" ); document.write( "t is years after 1925
\n" ); document.write( ".
\n" ); document.write( "So, they want to know when the record will be 47.6 seconds or less...
\n" ); document.write( "So, just \"plug it in\" and solve for 't':
\n" ); document.write( "R = -0.037t + 50.1
\n" ); document.write( "47.6 = -0.037t + 50.1
\n" ); document.write( "47.6 + 0.037t = 50.1
\n" ); document.write( "0.037t = 2.5
\n" ); document.write( "t = 2.5/0.037
\n" ); document.write( "t = 67.568 years after 1925
\n" ); document.write( ".
\n" ); document.write( "So,
\n" ); document.write( "1925 + 67.568 = 1992.568
\n" ); document.write( ".
\n" ); document.write( "Conclusion:
\n" ); document.write( "1992 and AFTER the world record will be 47.6 seconds or less\r
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